Mihailovs, Ivans Jānis, and Aira Aija Krūmina. “IS THE REPEAT A YEAR PRACTICE EFFECTIVE IN LATVIAN BASIC EDUCATION?”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, vol. 2, May 2018, pp. 332-41, https://doi.org/10.17770/sie2018vol1.3149.